Pediatric Nutrition — MCQs

Pediatric Nutrition Indian Medical PG Practice Questions and MCQs

Question 31: All are seen in Marasmus except?

A. Hepatomegaly (Correct Answer)
B. Muscle wasting
C. Voracious appetite
D. Weight loss

Explanation: **Explanation:** The core of this question lies in differentiating between the two main types of Protein-Energy Malnutrition (PEM): **Marasmus** and **Kwashiorkor**. **1. Why Hepatomegaly is the correct answer (The "Except"):** Hepatomegaly (specifically due to fatty liver infiltration) is a hallmark feature of **Kwashiorkor**, not Marasmus. In Kwashiorkor, a lack of dietary protein leads to decreased synthesis of Apolipoprotein B-100. This impairs the transport of triglycerides out of the liver as VLDLs, resulting in hepatic steatosis (fatty liver). In Marasmus, there is a global deficiency of both calories and protein, but because the body's metabolic adaptations remain relatively intact, fatty infiltration of the liver does not typically occur. **2. Analysis of Incorrect Options:** * **Muscle wasting:** This is a cardinal feature of Marasmus. Due to severe calorie deficiency, the body catabolizes muscle protein for energy, leading to the classic "skin and bones" appearance. * **Voracious appetite:** Children with Marasmus are typically alert and hungry (voracious appetite) because their body is in a state of starvation. In contrast, children with Kwashiorkor often suffer from anorexia (poor appetite). * **Weight loss:** Severe growth retardation and weight loss (weight-for-age <60% of expected) are defining characteristics of Marasmus. **Clinical Pearls for NEET-PG:** * **Marasmus:** "Balanced starvation," dry skin, "Old man/Monkey facies" (due to loss of buccal fat pads), and no edema. * **Kwashiorkor:** "Flaky paint" dermatosis, "Flag sign" (banded hair discoloration), and **pitting edema** (the essential diagnostic feature). * **Key differentiator:** Edema and Hepatomegaly = Kwashiorkor; Severe wasting and hunger = Marasmus.

Question 32: What is the most common cause of congenital hypothyroidism?

A. Antithyroid drugs
B. Thyroid dysgenesis (Correct Answer)
C. Defective hormone synthesis
D. Excessive iodine consumption

Explanation: **Explanation:** **Thyroid dysgenesis** is the most common cause of congenital hypothyroidism (CH), accounting for approximately **80–85% of cases**. It refers to a developmental abnormality of the thyroid gland, which includes: * **Ectopy:** The most common form (the gland is usually at the base of the tongue). * **Aplasia:** Complete absence of the gland. * **Hypoplasia:** An underdeveloped gland in the normal location. **Analysis of Incorrect Options:** * **Option C (Defective hormone synthesis):** Also known as **Dysmhorgonogenesis**, this accounts for about 10–15% of cases. It is typically inherited in an autosomal recessive pattern (e.g., TPO deficiency) and often presents with a goiter. * **Options A & D (Antithyroid drugs & Excessive iodine):** These are causes of **transient congenital hypothyroidism**. Maternal intake of drugs like methimazole or excessive iodine (povidone-iodine exposure) can temporarily suppress the fetal thyroid, but these are not the "most common" causes. **High-Yield Clinical Pearls for NEET-PG:** * **Clinical Presentation:** Most neonates are asymptomatic at birth due to maternal T4 transfer. Early signs include a large posterior fontanelle, prolonged physiological jaundice, umbilical hernia, and a hoarse cry. * **Screening:** The best time for screening is **48–72 hours after birth** to avoid the physiological TSH surge. * **Management:** Levothyroxine is the treatment of choice. To prevent permanent neurocognitive impairment (Cretinism), treatment must be started within the **first 2 weeks of life**. * **Imaging:** Technetium-99m pertechnetate scan or Ultrasound is used to differentiate dysgenesis from dyshormonogenesis.

Question 33: Compared to cow's milk, human milk contains:

A. Less fat (Correct Answer)
B. Less protein
C. Less carbohydrate
D. Less Calcium

Explanation: ### Explanation The composition of human milk is uniquely tailored to the nutritional and developmental needs of a human infant, differing significantly from cow’s milk. **1. Why "Less Fat" is the Correct Answer:** While the total fat content in both human and cow’s milk is roughly similar (approx. 3.5–4.5 g/dL), human milk technically contains slightly **less total fat** than cow's milk. However, the **quality** of fat is superior in human milk; it is rich in polyunsaturated fatty acids (PUFAs), DHA, and ARA, which are essential for brain and retinal development. Human milk also contains **lingual and gastric lipases**, making its fat much more digestible than the fat in cow's milk. **2. Analysis of Incorrect Options:** * **B. Less Protein:** Human milk contains significantly **less protein** (approx. 1.1 g/dL) compared to cow’s milk (approx. 3.3 g/dL). However, the ratio of **Whey to Casein** is 60:40 in human milk (easy to digest) versus 20:80 in cow’s milk (forms hard curds). * **C. Less Carbohydrate:** Human milk contains **more carbohydrate** (Lactose: 7 g/dL) than cow’s milk (Lactose: 4.5 g/dL). Lactose facilitates calcium absorption and promotes the growth of *Lactobacillus bifidus*. * **D. Less Calcium:** Human milk contains **less calcium** (approx. 28–35 mg/dL) than cow’s milk (approx. 120 mg/dL). Despite the lower quantity, the **bioavailability** of calcium is much higher in human milk. **3. High-Yield Clinical Pearls for NEET-PG:** * **Iron:** Both milks are low in iron, but **50% of iron** is absorbed from human milk compared to only 10% from cow’s milk. * **Vitamins:** Human milk is deficient in **Vitamin K and Vitamin D**. * **Protective Factors:** Human milk is rich in **IgA** (most abundant immunoglobulin), Lysozyme, and Lactoferrin. * **Energy Value:** Both provide approximately **67 kcal/100 ml**.

Question 34: What is the recommended daily maintenance fluid for a child weighing 10 kg?

A. 1500 ml/day
B. 1000 ml/day (Correct Answer)
C. 750 ml/day
D. 500 ml/day

Explanation: The calculation of maintenance fluids in pediatrics is a high-yield topic for NEET-PG, primarily based on the **Holliday-Segar Method**, which estimates caloric expenditure and fluid needs based on body weight. ### **Explanation of the Correct Answer** According to the Holliday-Segar formula, maintenance fluid requirements are calculated as follows: * **First 10 kg:** 100 ml/kg/day * **Next 10 kg (11–20 kg):** 50 ml/kg for each kg above 10 * **Each kg above 20 kg:** 20 ml/kg for each kg above 20 For a child weighing **10 kg**, the calculation is: $10 \text{ kg} \times 100 \text{ ml/kg} = \mathbf{1000 \text{ ml/day}}$. Therefore, **Option B** is correct. ### **Analysis of Incorrect Options** * **Option A (1500 ml/day):** This would be the requirement for a 20 kg child ($1000 \text{ ml for the first 10 kg} + 500 \text{ ml for the next 10 kg}$). * **Option C (750 ml/day):** This is an underestimation for a 10 kg child and would only suffice for a child weighing approximately 7.5 kg. * **Option D (500 ml/day):** This is insufficient for a 10 kg child and represents the maintenance fluid for a 5 kg infant. ### **Clinical Pearls for NEET-PG** 1. **Hourly Rate Rule (4-2-1 Rule):** For quick bedside calculations, use 4 ml/kg/hr for the first 10 kg, 2 ml/kg/hr for the next 10 kg, and 1 ml/kg/hr thereafter. For a 10 kg child: $10 \times 4 = 40 \text{ ml/hr}$ (which equals 960–1000 ml/day). 2. **Neonatal Exception:** The Holliday-Segar formula is **not** used for neonates (<28 days), as their fluid requirements change daily during the first week of life. 3. **Electrolytes:** Standard maintenance fluid usually includes Sodium (3 mEq/100ml) and Potassium (2 mEq/100ml).

Question 35: What is the recommended daily protein intake for an infant aged 0-6 months?

A. 0.5 gm/kg/day
B. 1 gm/kg/day (Correct Answer)
C. 1.5 gm/kg/day
D. 2 gm/kg/day

Explanation: ### Explanation **Correct Option: B (1 gm/kg/day)** The recommended dietary allowance (RDA) for protein in infants aged 0–6 months is approximately **1.05 gm/kg/day** (rounded to 1 gm/kg/day in standard textbooks and recent ICMR-NIN guidelines). During the first six months of life, infants experience the most rapid rate of growth and development. Breast milk, which contains roughly 1.1 gm of protein per 100 ml, is the gold standard source that perfectly meets this requirement while maintaining a safe solute load for the immature neonatal kidneys. **Analysis of Incorrect Options:** * **Option A (0.5 gm/kg/day):** This is significantly below the requirement for any pediatric age group. Such low intake would lead to growth failure and Protein-Energy Malnutrition (PEM). * **Option C (1.5 gm/kg/day):** This value is closer to the requirements for infants aged 6–12 months or those recovering from illness/malnutrition. For a healthy 0–6 month infant, 1.5 gm/kg is higher than the physiological baseline. * **Option D (2 gm/kg/day):** This is excessive for a healthy term infant. High protein intake in early infancy increases the **Renal Solute Load (RSL)**, which can lead to dehydration and hypernatremia, as infant kidneys have limited concentrating capacity. **High-Yield Clinical Pearls for NEET-PG:** * **Protein Source:** Whey-to-casein ratio in early breast milk is **80:20**, transitioning to **60:40** in mature milk, making it easily digestible compared to cow’s milk (20:80). * **Energy Requirement:** The calorie requirement for 0–6 months is approximately **92 kcal/kg/day** (ICMR 2020). * **Catch-up Growth:** In cases of Severe Acute Malnutrition (SAM), protein requirements may increase to **3–4 gm/kg/day** during the rehabilitation phase. * **Reference:** Always follow the latest **ICMR-NIN (National Institute of Nutrition)** guidelines for nutrition-related questions in Indian exams.

Question 36: Hungry diarrhoea is seen in which of the following conditions?

A. Marasmus (Correct Answer)
B. Kwashiorkor
C. Obesity
D. Dehydration

Explanation: **Explanation:** **Hungry Diarrhea** is a clinical phenomenon characterized by the passage of small, frequent, green-colored stools containing mucus but little fecal matter. It occurs in infants who are severely underfed or starved. **Why Marasmus is the correct answer:** In **Marasmus** (non-edematous Protein-Energy Malnutrition), there is a severe deficiency of both calories and proteins. Due to prolonged starvation, the intestinal transit time increases, and the small amount of food ingested is rapidly processed. The resulting stools are small, dark green (due to bile pigments that haven't been mixed with sufficient food), and contain mucus from the intestinal wall. This is a sign of extreme hunger rather than an infection, and it resolves once adequate feeding is initiated. **Why other options are incorrect:** * **Kwashiorkor:** While malnutrition is present, Kwashiorkor is primarily a protein deficiency with adequate or near-adequate caloric intake. It is characterized by edema and "flaky paint" dermatoses. Diarrhea in Kwashiorkor is more commonly due to malabsorption or secondary infections rather than starvation itself. * **Obesity:** This is a state of overnutrition; hungry diarrhea is physiologically impossible in this context. * **Dehydration:** This is a clinical *consequence* of diarrhea or fluid loss, not a primary cause of "hungry diarrhea." **High-Yield Clinical Pearls for NEET-PG:** * **Stool Appearance:** Hungry diarrhea stools are often described as "small, dry, and green." * **Management:** The treatment is to **increase caloric intake**, not to restrict food or use antibiotics. * **Differential Diagnosis:** Must be distinguished from infectious diarrhea (which has larger volume and systemic signs) and Hirschsprung’s disease (which presents with constipation/obstruction). * **Marasmus vs. Kwashiorkor:** Remember, Marasmus = "Balanced starvation" (Calorie + Protein deficiency); Kwashiorkor = "Sickness of the displaced child" (Selective Protein deficiency).

Question 37: Infants with hypernatraemic dehydration present with all of the following except?

A. Depressed anterior fontanelle (Correct Answer)
B. Dry tongue
C. Altered consciousness
D. Thready, feeble pulse

Explanation: In hypernatremic dehydration (Serum Sodium >150 mEq/L), water shifts from the intracellular space to the extracellular space (ECF) to maintain osmotic balance. This shift **preserves the intravascular and interstitial volumes** at the expense of intracellular fluid. ### Why "Depressed Anterior Fontanelle" is the Correct Answer: In typical isonatremic or hyponatremic dehydration, the loss of ECF leads to classic physical signs like a depressed anterior fontanelle, poor skin turgor (tenting), and sunken eyes. However, in **hypernatremic dehydration**, the ECF volume is relatively well-maintained. Consequently, the skin often feels **doughy or velvety** rather than losing turgor, and the fontanelle may remain flat or only slightly depressed, making it a misleading sign. ### Explanation of Incorrect Options: * **Dry Tongue:** This is a common feature of all types of dehydration due to decreased salivary secretions and mucosal dryness. * **Altered Consciousness:** This is a hallmark of hypernatremia. The shrinkage of brain cells (intracellular dehydration) leads to irritability, high-pitched crying, lethargy, seizures, or even coma. * **Thready, Feeble Pulse:** While circulatory collapse occurs later in hypernatremia compared to other types, severe dehydration will eventually lead to tachycardia and a thready pulse as compensatory mechanisms fail. ### NEET-PG High-Yield Pearls: 1. **The "Doughy" Feel:** The most characteristic skin finding in hypernatremic dehydration is a **doughy or rubbery texture**. 2. **Neurological Risk:** Rapid correction of hypernatremia can lead to **Cerebral Edema**. The goal is to lower sodium by no more than **0.5 mEq/L per hour** (or 10-12 mEq/L in 24 hours). 3. **Most Common Cause:** In infants, it is often due to improper dilution of formula or severe osmotic diarrhea.

Question 38: In a breastfed infant, what is the primary reason for a reduced chance of enteric infection?

A. Presence of beneficial nutrients and immune-boosting factors in breast milk
B. Immunoglobulin content in breast milk
C. Sterile nature of expressed breast milk
D. All of the above (Correct Answer)

Explanation: Breast milk is the gold standard for infant nutrition, providing a multi-layered defense mechanism against enteric infections (diarrheal diseases), which remain a leading cause of infant mortality. **Explanation of the Correct Answer:** The reduced incidence of enteric infections in breastfed infants is multifactorial, involving biological, immunological, and hygienic components: * **Beneficial Nutrients & Factors (Option A):** Breast milk contains **Lactoferrin** (sequesters iron, inhibiting bacterial growth), **Lysozymes**, and **Bifidus factor**. Bifidus factor promotes the growth of *Lactobacillus bifidus*, which maintains an acidic gut pH, making the environment hostile to pathogens like *E. coli* and *Shigella*. * **Immunoglobulin Content (Option B):** **Secretory IgA (sIgA)** is the most significant antibody in breast milk. It acts locally in the infant's gut to prevent the attachment of pathogens to the intestinal mucosa (mucosal immunity). * **Sterile Nature (Option C):** Unlike formula or cow’s milk, which are prone to contamination during preparation (unclean water, unsterilized bottles), breast milk is delivered directly from the source, significantly reducing the risk of exogenous pathogen introduction. **High-Yield Clinical Pearls for NEET-PG:** * **Colostrum:** The "first milk" (days 1-3) is richest in IgA and lactoferrin. * **Comparison:** Breast milk has less protein than cow’s milk (1.1 g/dL vs 3.3 g/dL) but higher bioavailability and better whey-to-casein ratio (60:40). * **Protective Effect:** Breastfeeding reduces the risk of Necrotizing Enterocolitis (NEC) in preterm infants. * **Vitamins:** Breast milk is deficient in **Vitamin K** (given at birth) and **Vitamin D**. It also has low iron content, but the iron present has very high bioavailability (50-70%).

Question 39: What is true about breast feeding?

A. It is best for both preterm and term infants.
B. It promotes Lactobacillus growth in the bowel.
C. It decreases the incidence of allergic disorders.
D. All of the above. (Correct Answer)

Explanation: Breast milk is the gold standard for infant nutrition, providing biological, immunological, and psychological benefits. **Explanation of Options:** * **Option A:** Breast milk is the ideal choice for both term and preterm infants. For **preterm infants**, it is specifically protective against **Necrotizing Enterocolitis (NEC)** and provides essential enzymes and growth factors that support an immature gut. * **Option B:** Breast milk contains **Bifidus factor**, which promotes the growth of *Lactobacillus bifidus*. This creates an acidic environment in the gut, inhibiting the growth of pathogenic bacteria like *E. coli* and *Shigella*. * **Option C:** Breast milk contains **Secretory IgA**, which coats the intestinal mucosa, preventing the absorption of foreign macromolecules. This "gut closure" effect significantly reduces the risk of atopic dermatitis, asthma, and food allergies. **Why "All of the Above" is Correct:** Each statement accurately reflects a core physiological benefit of breastfeeding—nutritional suitability, microbiome modulation, and immunological protection. **High-Yield Clinical Pearls for NEET-PG:** * **Colostrum:** Rich in IgA and proteins; has a purgative effect to help pass meconium. * **Nutritional Differences:** Breast milk has **less protein** than cow’s milk (easier on kidneys) but the protein is mainly **Whey (60:40 ratio)**, which is more digestible than the Casein in cow’s milk. * **Deficiencies:** Breast milk is naturally low in **Vitamin D and Vitamin K**. Iron content is low but has **high bioavailability (50%)** compared to cow's milk (10%). * **Contraindications:** Absolute maternal contraindications include HIV (in developed settings), active untreated TB, and Galactosemia in the infant.

Question 40: Acrodermatitis enteropathica is a classical presentation due to deficiency of?

A. Vitamin K
B. Zinc (Correct Answer)
C. Copper
D. Selenium

Explanation: **Explanation:** **Acrodermatitis Enteropathica (AE)** is an autosomal recessive disorder caused by a mutation in the **SLC39A4 gene**, which encodes the **ZIP4 transporter**. This defect leads to impaired intestinal absorption of **Zinc**. 1. **Why Zinc is Correct:** Zinc is a vital trace element for cell division and protein synthesis. Its deficiency manifests as the classic triad of **periorificial and acral dermatitis** (vesiculobullous or eczematous lesions around the mouth, anus, and limbs), **alopecia**, and **diarrhea**. It typically presents in infants when transitioning from breast milk to formula or solid foods, as breast milk contains a zinc-binding ligand that facilitates absorption. 2. **Why Other Options are Incorrect:** * **Vitamin K:** Deficiency leads to bleeding diathesis (Hemorrhagic Disease of the Newborn) due to decreased synthesis of clotting factors II, VII, IX, and X. * **Copper:** Deficiency (Menkes Kinky Hair Syndrome) presents with "steely" or "kinky" hair, growth failure, and neurological regression, but not periorificial dermatitis. * **Selenium:** Deficiency is associated with **Keshan disease** (cardiomyopathy) and Kashin-Beck disease (osteoarthropathy). **Clinical Pearls for NEET-PG:** * **Classic Triad:** Dermatitis (Acral/Periorificial), Alopecia, and Diarrhea. * **Diagnosis:** Low serum alkaline phosphatase (as it is a zinc-dependent enzyme) and low serum zinc levels. * **Treatment:** Lifelong oral zinc supplementation (elemental zinc 1–3 mg/kg/day). * **Acquired Zinc Deficiency:** Can occur in patients on prolonged Total Parenteral Nutrition (TPN) without trace element supplementation or in malabsorption syndromes.

Practice by Chapter

Breastfeeding

Practice Questions

Infant Formula Feeding

Practice Questions

Complementary Feeding

Practice Questions

Nutritional Requirements by Age

Practice Questions

Malnutrition and Failure to Thrive

Practice Questions

Obesity in Children

Practice Questions

Vitamin Deficiencies

Practice Questions

Mineral Deficiencies

Practice Questions

Food Allergies and Intolerances

Practice Questions

Nutritional Management of Chronic Diseases

Practice Questions

Eating Disorders

Practice Questions

Parenteral and Enteral Nutrition

Practice Questions

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